Current wasnt flowing because the cathodes had no relation to ground, which in this case is minus in the circuit. The circuit was open and could not pass current. If last filtercap was not grounded, it just stopped filtering, but it has nothing with current flow to do since a capacitor can not pass current.

OK. First get the filament supply right, then look at the PSU. Don't connect up the B+ until the filament supply is working correctly. You should now have about 11v on the top of the cathode resistor, and the bottom is connected to ground. What is the actual voltage you have now on top of the cathode resistor?

I have 9,33V left channel & 9,75V right channel, my cathode resistor is 10 ohms.

With filament bias it is important to connect everything in the right order. This is -

1. Connect Rod regulator up. Minus to ground, plus to pin 4 of 26
2. Connect resistor from pin 1 of 26 to ground.
3. Insert tube and turn on regulator
4. Measure across pins 1 and 4 for 1.5v
5. Measure from pin 1 to ground - for 10 ohm resistor should be about 10v, since current is 1 amp. Use ohms law.
6. Leave the supply on for about 30m to make sure it is stable.

AFTER you have done all this and the voltages measure the same after 30m, you can connect the B+.

With filament bias it is important to connect everything in the right order. This is -

1. Connect Rod regulator up. Minus to ground, plus to pin 4 of 26 CONNECTED TO PIN 1, DONE
2. Connect resistor from pin 1 of 26 to ground. CONNECTED TO PIN 4, DONE
3. Insert tube and turn on regulator DONE
4. Measure across pins 1 and 4 for 1.5v DONE
5. Measure from pin 1 to ground - for 10 ohm resistor should be about 10v, since current is 1 amp. Use ohms law. FROM PIN 4 TO GROUND 10V DVM PLUS LEAD TO PIN 4 DVM MINUS LEAD TO GROUND
6. Leave the supply on for about 30m to make sure it is stable. OK

AFTER you have done all this and the voltages measure the same after 30m, you can connect the B+.